1 Features
• Compliance to USB 2.0 and eUSB2 (rev 1.2)
• Support for low-speed (LS), full-speed (FS), highspeed
(HS)
• Best-in-class high-speed total jitter of 20ps
• Register access protocol receptor capable
• Dual independent repeater
• 2:2 crossbar mux (DSBGA package only)
• Host and device mode (DRD) support
• Selection between 1.2V and 1.8V control or I2C
levels using VIOSEL pin
• Auto detection for I2C or strap-pin options
– Three strap-pins for USB 2.0 high-speed
channel compensation settings
– I2C device interface for more configurations
• Device variants
– eUSB2 1.0V or 1.2V signaling interface
– Four eUSB2 trace loss compensation levels for
different product form-factors: 2.5, 5, 7.5, and
10 inches
• Supports auto-resume ECR as well as L2 interrupt
resume mode
• CTA-936 USB Carkit UART support
• Optional BC1.2 CDP battery charging and
detection support
• Optional GPIO modes for EQ pins for debug and
I2C ↔ GPIOs through EQ0/1
• I2C accessible debug capabilities for
manufacturing tests

2 Applications
• Communications equipment
• Enterprise systems
• Notebooks and desktops
• Industrial
• Tablets
• Portable electronics

3 Description
The TUSB2E221 enables implementation of USB
2.0 compliant port on newer processors using lower
voltage processes.
The TUSB2E221 is a USB eUSB2-USB 2.0 repeater
supporting both device and host modes. The
TUSB2E221 supports USB low-speed (LS) and fullspeed
(FS) signals and high-speed (HS) signals.
The TUSB2E221 is designed to interface with eUSB2
eDSPr or eUSPr operating at 1.2V single-ended
signaling.
The TUSB2E221 has multiple patented designs to
provide robust interoperability, optimum performance,
and power.
For systems without an I2C interface, the device offers
eight individual settings with three strap-pins for USB
2.0 channel Equivalent Series Resistance (ESR) up
to 17.5Ω. Device variants are available for different
levels of eUSB2 trace length compensation up to 10
inches.
The I2C interface permits additional flexibility for users
to fine tune the RX and TX settings of the device. The
available settings are RX equalization, RX squelch
threshold, RX disconnect thresholds, TX amplitude,
TX slew rate and TX pre-emphasis.
Various debug options are available through the three
EQ pins that can be configured to monitor various
USB bus states or interrupt as well as CTA-936 UART
mode control that can provide SoC debug capabilities.
EQ0 and EQ1 can be used as general purpose I2C to
GPIOs bridge.